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Other names :
Ethyl 2,4-decadienoate ; Ethyl deca-2,4-dienoate ; Ethy trans-2-cis-4-decadienoate ; Ethyl deca-trans-2-cis-4-dienoate ; Ethyl (E)-2-(Z)-4-decadienoate ; Ethyl deca-(E)-2-(Z)-4-dienoate ; Ethyl decadienotate ; Ester poire ; Ethyl (E,Z)-2,4-décadienoate ; Ester de poire
Uses in perfumery :
Pear Ester is used in apple and pear reconstitutions, in association with violet notes (Alpha-Ionone, Beta-Ionone), with exotic fruits notes. It can also bring the fruity aspect of a rose accord.
Natural availability :
Pear Ester is so-called because it is found in the odorous principle of pears, and particularly in Williams pears. It is also found in apple, grapes, durian and other fruits. It does not exist on a natural state for perfumery.
Year of discovery :
Data not available.
Other comments :
In comparision to a pear note as Hexyl acetate, Pear Ester brings a juicy and natural fruit facet.
Price Range :
Esters tend to form their corresponding acid in stability.
- Molecular formula :
- Molecular Weight :
- 196.29 g/mol
- Density :
- Flash Point :
- 235°F (113°C)
- Fusion Point :
- -76°F (-60°C)
- Appearance :
- Colorless liquid
- Log P :
- Boiling Point :
- 160°F (at 0.07 hPa) (71°C)
- Detection Threshold :
- In the order of 100 ppb (0.00001%)
Synthesis route :
Pear Ester is prepared in three steps. Starting from cis-1-heptenyl, the first step is a conversion of this molecule into 1-heptenyl lithium, in the presence of a lithium and copper iodide complex. Reacting the intermediary product with Ethyl Propiolate leads to a mixture of Pear Ester (95% of the mixture) and trans-2-trans-4-decadienoate (5% of the mixture). The last step is a fractionnal distillation to purify Pear Ester.
Pear Ester is also prepared on a biotechnological way. The latter is not detailled here.
Synthesis precursor :
Pear Ester is not used for the synthesis of another compound used in perfumery.
Pear Ester is a purely isomeric component. It is the major component formed during its synthesis, also including ethyl trans-2-trans-4-decadienoate, its diastereoisomer. It is separated from this component by fractionnal distillation.
Pear Ester also is a constitutionnal isomer of numerous other esters as Linalyl acetate, Geranyl acetate and Allyl Cyclohexyl Propionate.
- EINECS number :
- FEMA number :
- JECFA number :
- FLAVIS number :
- Allergens :
- This ingredient does not contain any allergen.
- IFRA :
- This ingredient is not restricted
To learn more about IFRA's standards : https://ifrafragrance.org/safe-use/library
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